For the orthographic projection as a map projection, see Orthographic projection in cartography. For mathematical discussion in terms of linear algebra, see Projection (linear algebra).
Bullfrogs are the largest real frog found in North America, weighing up to 0.5 kg and measuring 460 mm in length. Their average length is 100-175 mm. Their color varies from brownish to shades of green, often with spots or blotches of a darker color around their backs. Their back feet are fully webbed.
Bullfrogs are predators that eat practically anything they can catch. They can swallow tree frogs, other amphibians and reptiles such as the western pond turtle, minnows, small birds, and young snakes. Introduced bullfrogs have been blamed for native species declines in much of North America.hey are found in a variety of freshwater habitats, including ponds, marshes, streams, rivers, canals, reservoirs, ditches, shallow wetlands, and storm water ponds. Bullfrogs compete with, and prey on, a wide range of native species, and can affect significantly native ecosystems such as wetlands.